11865139 has 24 divisors (see below), whose sum is σ = 14821520. Its totient is φ = 9408960.

The previous prime is 11865131. The next prime is 11865143. The reversal of 11865139 is 93156811.

It is not a de Polignac number, because 11865139 - 2³ = 11865131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11865131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29689 + ... + 30085.

Almost surely, 2^11865139 is an apocalyptic number.

11865139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11865139 is a deficient number, since it is larger than the sum of its proper divisors (2956381).

11865139 is a wasteful number, since it uses less digits than its factorization.

11865139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451 (or 440 counting only the distinct ones).

The product of its digits is 6480, while the sum is 34.

The square root of 11865139 is about 3444.5811066079. The cubic root of 11865139 is about 228.0819637087.

The spelling of 11865139 in words is "eleven million, eight hundred sixty-five thousand, one hundred thirty-nine".